public static RenderQueue fromString(string commands)
{
RenderQueue queue = new RenderQueue();
foreach (char c in commands)
{
queue.enqueue(dictionary[c]);
}
return(queue);
}
private void updatePosition()
{
RenderCommand rc = RenderCommand.NONE;
bool updatedPos = false;
while (!(word.empty()) && !updatedPos)
{
rc = word.dequeue();
switch (rc)
{
case RenderCommand.FORWARD:
case RenderCommand.FORWARD2:
float x;
float y;
double theta = Math.Atan2(pos.y, pos.x);
x = (float)(forward * Math.Cos(theta));
y = (float)(forward * Math.Sin(theta));
//Debug.Log("THETA: X: " + x + " Y: " + y);
double r = Math.Sqrt(x * x + y * y);
x = (float)(r * Math.Cos(startHeading));
y = (float)(r * Math.Sin(startHeading));
//Debug.Log("R: X: " + x + " Y: " + y);
pos.x += x;
pos.y += y;
updatedPos = true;
break;
case RenderCommand.RIGHT:
startHeading += (turn * Math.PI / 180.0);
break;
case RenderCommand.LEFT:
startHeading += (-turn * Math.PI / 180.0);
break;
case RenderCommand.PUSH:
case RenderCommand.POP:
case RenderCommand.IGNORE:
default:
break;
}
word.enqueue(rc);
}
}
/**
* Perform the rewriting for the given number of generations.
* @param seed starting word
* @param numGenerations how many times to rewrite the word with our rules
* @return the nth-generation word
*/
public RenderQueue rewrite(RenderQueue seed, int numGenerations)
{
// Implementation is just to treat the seed as the "previous" output
// queue and then move the output queue to be the input queue for
// the next generation, apply the rules to any axioms for which we
// have rules (the other axioms are copied over to the output
// directly). Repeat this process for the given number of generations.
RenderQueue output = seed.copy();
RenderQueue input;
for (int gen = 0; gen < numGenerations; gen++)
{
input = output; // last generation's output is this one's input
output = new RenderQueue();
while (!input.empty())
{
RenderCommand nextInput = input.dequeue();
// look through the from-list to find a rule to invoke
bool ruleFound = false;
for (int i = 0; !ruleFound && i < from.Length; i++)
{
if (from[i] == nextInput)
{
ruleFound = true;
// append a copy of this rule's right side onto the
// end of the output queue
output.append(to[i]);
}
}
// if no rule was found, then just copy this command to output
if (!ruleFound)
{
output.enqueue(nextInput);
}
}
}
return(output);
}
